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When the door is closed, the bolt extends into the hole in the strike plate and holds the door closed. The strike plate protects the jamb against friction from the bolt and increases security in the case of a jamb made of a softer material (such as wood) than the strike plate. Some strike plates have their hole size and placement calculated so ...
Bolt – A (nearly always) metal shaft attached by cleats or a specific form of bracket, that slides into the jamb to fasten a door. [2]: 89 Draw bolt - A form of crossbar latch where a bolt, held in place by metal bails, is slid to engage a bail fixed to a jamb or mating door. A small, typically knob, handle is affixed to the bolt to aid grip.
A metal doorframe with a strike plate built in: in other doors this would be a metal strikeplate in a wooden doorframe. The term door security or door security gate may refer to any of a range of measures used to strengthen doors against door breaching, ram-raiding and lock picking, and prevent crimes such as burglary and home invasions.
The jambs of a window outside the frame are called reveals. Small shafts to doors and windows with caps and bases are called jamb-shafts; when in the inside arris of the jamb of a window, they are sometimes called scoinsons. [2] A doorjamb, door jamb, or sometimes doorpost is the vertical portion of the door frame onto which a door is secured. [3]
Door casing, door frame, or chambranle – formed by the lintel and the two jambs. Sill (for exterior doors) – A horizontal sill plate below the door that supports the door frame. Similar to a window sill but for a door; Threshold (for exterior doors) – A horizontal plate below the door that bridges the crack between the interior floor and ...
The principle behind an electromagnetic lock is the use of electromagnetism to lock a door when energized. The holding force should be collinear with the load, and the lock and armature plate should be face-to-face to achieve optimal operation. The magnetic lock relies upon some of the basic concepts of electromagnetism.
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